Back to results
US 5,665,983 AGranted
Photocoupler device having light emitting device and photo detector
AssigneeNEC Corporation
InventorHiroki Nagano
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeNEC Corporation
InventorHiroki Nagano
Estimating the term…
It is an object of the present invention to provide a photocoupler which maintains a high electric isolation performance and has an improved optical coupling efficiency without any variation of a conventional structure and a conventional production process. The photocoupler includes a light emitting device 1 and a photo detector 2 disposed in a facing relationship to each other, a silicon resin 4 covering over the light emitting device 1, a light transmitting resin 5 molding the silicon resin 4 which covers over the light emitting device 1 and the photo detector 2, and a light shielding resin 6 molding the light transmitting resin 5. In the photocoupler, a light scattering material is mixed in the silicon resin 4 which covers over the light emitting device 1. The amount of light scattering material mixed in the silicon resin 4 can be selected from 0.1 to 5.0 percentage by weight of the amount of the silicon resin 4. Further, the silicon resin 4 can be shaped so that the face facing the photo detector 2 is concave.
A photocoupler comprising:
A photocoupler comprising:
A photocoupler comprising:
Dependencies are inferred from the claim text.